LM270WF1 LG, LM270WF1 Datasheet - Page 8

• Manufacturer Part Number: LM270WF1
• Description: LCD Module
• Manufacturer: LG

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Note : The design of the inverter must have specifications for the lamp in LCD Assembly.
Table 2_2. ELECTRICAL CHARACTERISTICS
LAMP :
Operating Voltage
Operating Current
Established Starting Voltage
Operating Frequency
Discharge Stabilization Time
Power Consumption
Life Time
※ Do not attach a conducting tape to lamp connecting wire.
1. Specified values are for a single lamp.
2. Operating voltage is measured at 25
3. The voltage above V
4. Lamp frequency may produce interface with horizontal synchronous frequency and as a result this may
5. Let’s define the brightness of the lamp after being lighted for 5 minutes as 100%.
6. The lamp power consumption shown above does not include loss of external inverter.
7. The life is determined as the time at which brightness of the lamp is 50% compared to that of initial
Ver 0.0
cause beat on the display. Therefore lamp frequency shall be as away possible from the horizontal
Otherwise, the lamps may not be turned on. The used lamp current is the lamp typical current.
synchronous frequency and from its harmonics in order to prevent interference.
T
The used lamp current is the lamp typical current. (P
value at the typical lamp current on condition of continuous operating at 25
If the lamp wire attach to a conducting tape, TFT-LCD Module has a low luminance and the inverter
has abnormal action. Because leakage current is occurred between lamp wire and conducting tape.
(Inverter open voltage must be more than lamp starting voltage.)
The performance of the Lamp in LCM, for example life time or brightness, is extremely influenced by
designed so as not to produce too much leakage current from high-voltage output of the inverter.
of the lamp and the inverter (no lighting, flicker, etc) never occurs. When you confirm it, the LCD–
Assembly should be operated in the same condition as installed in you instrument.
the characteristics of the DC-AC inverter. So all the parameters of an inverter should be carefully
When you design or order the inverter, please make sure unwanted lighting caused by the mismatch
S
is the time required for the brightness of the center of the lamp to be not less than 95%.
Parameter
at 25 °C
at 0 °C
S
should be applied to the lamps for more than 1 second for start-up.
Symbol
V
P
I
f
Vs
Ts
BL
BL
BL
BL
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Product Specification
2°C. The variance of the voltage is
1900(7.0mA)
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July. 2. 2008
40,000
47.3
Min
3.0
40
-
-
BL
1990(6.0mA)
= V
Values
83.6
Typ
6.0
BL
-
-
-
x I
BL
x N
2250(3.0mA)
Lamp
3000
3600
93.1
Max
7.0
3.0
80
)
10%.
2°C.
Liquid Crystal Display
mA
Watt
V
V
V
Unit
kHz
Min
Hrs
RMS
RMS
RMS
RMS
LM270WF1
Notes
1, 2
1, 3
1, 5
1, 7
8 / 31
1
4
6